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Diffstat (limited to 'sha1_file.c')
-rw-r--r--sha1_file.c123
1 files changed, 31 insertions, 92 deletions
diff --git a/sha1_file.c b/sha1_file.c
index 63981fb3fd..006321e009 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -35,54 +35,6 @@ static size_t sz_fmt(size_t s) { return s; }
const unsigned char null_sha1[20];
-const signed char hexval_table[256] = {
- -1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 18-1f */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 20-27 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 28-2f */
- 0, 1, 2, 3, 4, 5, 6, 7, /* 30-37 */
- 8, 9, -1, -1, -1, -1, -1, -1, /* 38-3f */
- -1, 10, 11, 12, 13, 14, 15, -1, /* 40-47 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 48-4f */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 50-57 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 58-5f */
- -1, 10, 11, 12, 13, 14, 15, -1, /* 60-67 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 68-67 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 70-77 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 78-7f */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 80-87 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 88-8f */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 90-97 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* 98-9f */
- -1, -1, -1, -1, -1, -1, -1, -1, /* a0-a7 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* a8-af */
- -1, -1, -1, -1, -1, -1, -1, -1, /* b0-b7 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* b8-bf */
- -1, -1, -1, -1, -1, -1, -1, -1, /* c0-c7 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* c8-cf */
- -1, -1, -1, -1, -1, -1, -1, -1, /* d0-d7 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* d8-df */
- -1, -1, -1, -1, -1, -1, -1, -1, /* e0-e7 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* e8-ef */
- -1, -1, -1, -1, -1, -1, -1, -1, /* f0-f7 */
- -1, -1, -1, -1, -1, -1, -1, -1, /* f8-ff */
-};
-
-int get_sha1_hex(const char *hex, unsigned char *sha1)
-{
- int i;
- for (i = 0; i < 20; i++) {
- unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]);
- if (val & ~0xff)
- return -1;
- *sha1++ = val;
- hex += 2;
- }
- return 0;
-}
-
static inline int offset_1st_component(const char *path)
{
if (has_dos_drive_prefix(path))
@@ -133,24 +85,6 @@ int safe_create_leading_directories_const(const char *path)
return result;
}
-char *sha1_to_hex(const unsigned char *sha1)
-{
- static int bufno;
- static char hexbuffer[4][50];
- static const char hex[] = "0123456789abcdef";
- char *buffer = hexbuffer[3 & ++bufno], *buf = buffer;
- int i;
-
- for (i = 0; i < 20; i++) {
- unsigned int val = *sha1++;
- *buf++ = hex[val >> 4];
- *buf++ = hex[val & 0xf];
- }
- *buf = '\0';
-
- return buffer;
-}
-
static void fill_sha1_path(char *pathbuf, const unsigned char *sha1)
{
int i;
@@ -1232,7 +1166,7 @@ static int unpack_sha1_header(z_stream *stream, unsigned char *map, unsigned lon
static void *unpack_sha1_rest(z_stream *stream, void *buffer, unsigned long size, const unsigned char *sha1)
{
int bytes = strlen(buffer) + 1;
- unsigned char *buf = xmalloc(1+size);
+ unsigned char *buf = xmallocz(size);
unsigned long n;
int status = Z_OK;
@@ -1260,7 +1194,6 @@ static void *unpack_sha1_rest(z_stream *stream, void *buffer, unsigned long size
while (status == Z_OK)
status = git_inflate(stream, Z_FINISH);
}
- buf[size] = 0;
if (status == Z_STREAM_END && !stream->avail_in) {
git_inflate_end(stream);
return buf;
@@ -1583,8 +1516,7 @@ static void *unpack_compressed_entry(struct packed_git *p,
z_stream stream;
unsigned char *buffer, *in;
- buffer = xmalloc(size + 1);
- buffer[size] = 0;
+ buffer = xmallocz(size);
memset(&stream, 0, sizeof(stream));
stream.next_out = buffer;
stream.avail_out = size + 1;
@@ -2349,9 +2281,10 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
void *buf, unsigned long len, time_t mtime)
{
int fd, ret;
- size_t size;
- unsigned char *compressed;
+ unsigned char compressed[4096];
z_stream stream;
+ git_SHA_CTX c;
+ unsigned char parano_sha1[20];
char *filename;
static char tmpfile[PATH_MAX];
@@ -2369,36 +2302,40 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
/* Set it up */
memset(&stream, 0, sizeof(stream));
deflateInit(&stream, zlib_compression_level);
- size = 8 + deflateBound(&stream, len+hdrlen);
- compressed = xmalloc(size);
-
- /* Compress it */
stream.next_out = compressed;
- stream.avail_out = size;
+ stream.avail_out = sizeof(compressed);
+ git_SHA1_Init(&c);
/* First header.. */
stream.next_in = (unsigned char *)hdr;
stream.avail_in = hdrlen;
while (deflate(&stream, 0) == Z_OK)
/* nothing */;
+ git_SHA1_Update(&c, hdr, hdrlen);
/* Then the data itself.. */
stream.next_in = buf;
stream.avail_in = len;
- ret = deflate(&stream, Z_FINISH);
+ do {
+ unsigned char *in0 = stream.next_in;
+ ret = deflate(&stream, Z_FINISH);
+ git_SHA1_Update(&c, in0, stream.next_in - in0);
+ if (write_buffer(fd, compressed, stream.next_out - compressed) < 0)
+ die("unable to write sha1 file");
+ stream.next_out = compressed;
+ stream.avail_out = sizeof(compressed);
+ } while (ret == Z_OK);
+
if (ret != Z_STREAM_END)
die("unable to deflate new object %s (%d)", sha1_to_hex(sha1), ret);
-
ret = deflateEnd(&stream);
if (ret != Z_OK)
die("deflateEnd on object %s failed (%d)", sha1_to_hex(sha1), ret);
+ git_SHA1_Final(parano_sha1, &c);
+ if (hashcmp(sha1, parano_sha1) != 0)
+ die("confused by unstable object source data for %s", sha1_to_hex(sha1));
- size = stream.total_out;
-
- if (write_buffer(fd, compressed, size) < 0)
- die("unable to write sha1 file");
close_sha1_file(fd);
- free(compressed);
if (mtime) {
struct utimbuf utb;
@@ -2458,14 +2395,6 @@ int has_pack_index(const unsigned char *sha1)
return 1;
}
-int has_pack_file(const unsigned char *sha1)
-{
- struct stat st;
- if (stat(sha1_pack_name(sha1), &st))
- return 0;
- return 1;
-}
-
int has_sha1_pack(const unsigned char *sha1)
{
struct pack_entry e;
@@ -2510,6 +2439,8 @@ static int index_mem(unsigned char *sha1, void *buf, size_t size,
return ret;
}
+#define SMALL_FILE_SIZE (32*1024)
+
int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
enum object_type type, const char *path)
{
@@ -2524,6 +2455,14 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
else
ret = -1;
strbuf_release(&sbuf);
+ } else if (size <= SMALL_FILE_SIZE) {
+ char *buf = xmalloc(size);
+ if (size == read_in_full(fd, buf, size))
+ ret = index_mem(sha1, buf, size, write_object, type,
+ path);
+ else
+ ret = error("short read %s", strerror(errno));
+ free(buf);
} else if (size) {
void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
ret = index_mem(sha1, buf, size, write_object, type, path);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 02:17:17 +0000